.Normal conversation sound of man ranges froma) 25DB-45dB b) 35DB-55dB c) 35DB-60dB d) 35DB-65D

To determine the normal conversation sound range for a man, we will analyze the options provided.

Analyzing Options:

1. Option A: 25dB - 45dB

   • This range is quite low for normal conversational sound.

2. Option B: 35dB - 55dB

   • This range is more in line with conversational levels but still on the lower end.

3. Option C: 35dB - 60dB

   • This range is plausible as it includes levels typically associated with normal conversations.

4. Option D: 35dB - 65dB

   • This range covers a broader spectrum and includes louder conversational volumes, which can be typical in settings with background noise.

Conclusion:

Normal conversation usually ranges between 60dB to around 70dB at maximum volume. Considering the provided answers, option C (35dB - 60dB) seems to be the most appropriate choice, as it encompasses levels that align with lower to moderate conversational sounds.

Therefore, the best answer to the question is c) 35DB-60dB.